Malicious PDF — malware analysis report

Static analysis result for SHA-256 22102f18cd1aa492…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 06:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 768548d730b085538cc851784c73cf91 SHA-1: 8484e2c7e2f8c76a1a6e1e497e1ac9302223a00c SHA-256: 22102f18cd1aa49298ee510f51ee13cda0ecf76ca061aa8ce127bffbdc300b50
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to a link farm designed to obscure the ultimate destination. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to deliver the final payload. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. No scripts were extracted, but the PDF structure and link farm indicate a phishing or redirection attempt.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=cancer+cells+properties+pdf
    • http://files.reyamore.com/uploads/1/3/0/7/130740141/c9c38d1039b1ad8.pdf
    • http://files.lbcf1689kjv.com/uploads/1/3/1/4/131437563/5312098.pdf
    • http://files.kaitlinkaufman.com/uploads/1/3/2/7/132741429/gomuda_vezosi_wafubo_nepopipekota.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/check_starbucks_card_balance.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/electronically_sign_linux.pdf
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/zetuze.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/23488655407.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/duwawabeboxon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/48104507521.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/bedelojuxakegogaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8176/files/dejizaxabutigat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/54762972902.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/59646669713.pdf
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/archive_outlook_emails_to.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/solepixojenu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006085.bin
5917457de540a2b832743e9851f6e7f936133c5fbd192bce5cacf9bffbfb0ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 5052 bytes
font_01_sfnt_off000071be.bin
a7449b2a4c0d8be72a794704631cb94ec83aa327056cf4400987a21e6383ce0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 10960 bytes

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